Calhoun County, Illinois

Calhoun County
County
Calhoun County Courthouse in Hardin
Location within the U.S. state of Illinois
Illinois's location within the U.S.
Coordinates: 39°10′N 90°40′W / 39.16°N 90.67°W / 39.16; -90.67
Country	United States
State	Illinois
Founded	1825
Named for	John C. Calhoun
Seat	Hardin
Largest village	Hardin
Area
• Total	284 sq mi (740 km2)
• Land	254 sq mi (660 km2)
• Water	30 sq mi (80 km2)  10.5%
Population  (2020)
• Total	4,437
• Density	16/sq mi (6.0/km2)
Time zone	UTC−6 (Central)
• Summer (DST)	UTC−5 (CDT)
Congressional district	15th

Calhoun County is a county in the U.S. state of Illinois. As of the 2020 census, the population was 4,437,^[1] making it Illinois’ third-least populous county. Its county seat and biggest community is Hardin, with a population of 801.^[2] Its smallest incorporated community is Hamburg, with a population of 99. Calhoun County is at the tip of the peninsula formed by the courses of the Mississippi and Illinois rivers above their confluence and is almost completely surrounded by water. Calhoun County is sparsely populated; it has just five municipalities, all of them villages.^[3]

Calhoun County is part of the Metro-East portion of the St. Louis, MO-IL Metropolitan Statistical Area.